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Defined Benefit Pension and Other Postretirement Benefit Plans (Tables)
 3 Months Ended
Jun. 30, 2012
Defined Benefit Pension and Other Postretirement Benefit Plans  
Components of net periodic benefit costs relating to pension and other postretirement benefit plans

 

 

 

 

Pension

 

Postretirement Benefit Plans

 

 

 

Quarters Ended June 30,

 

Quarters Ended June 30,

 

 

 

2012

 

2011

 

2012

 

2011

 

Net service cost

 

$

414

 

$

331

 

$

—

 

$

—

 

Interest cost

 

494

 

533

 

9

 

14

 

Expected return on net assets

 

(172

)

(175

)

—

 

—

 

Amortization:

 

 

 

 

 

 

 

 

 

Actuarial (gain) loss

 

130

 

96

 

(72

)

(71

)

Prior service cost

 

6

 

6

 

—

 

—

 

 

 

 

 

 

 

 

 

 

 

Total net periodic benefit (income) costs

 

$

872

 

$

791

 

$

(63

)

$

(57

)